Update dependency phpstan/phpstan-symfony to v1.4.11

This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan-symfony	require-dev	patch	1.4.10 -> 1.4.11

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Release Notes

phpstan/phpstan-symfony (phpstan/phpstan-symfony)

v1.4.11

Compare Source

• 270c2ee - Update Process.stub

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